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35-670: The OQ-2 was originally a radio controlled aircraft model designed by Walter Righter. The design, along with its engine design, was purchased by actor Reginald Denny , who had demonstrated another model to the US Army in 1940. Calling the new design the RP-2, he demonstrated several updated versions to the Army as the RP-2, RP-3 and RP-4 in 1939. In 1940, the Army It was at this factory on June 26, 1945, that Army photographer David Conover saw

70-697: A couple thousand dollars , all the way down to under US$ 30 for some. Some manufacturers even offer conversion kits for older digital 72 MHz or 35 MHz receivers and radios. As the emerging multitude of 2.4 GHz band spread spectrum RC systems usually use a "frequency-agile" mode of operations, like FHSS that do not stay on one set frequency any longer while in use, the older "exclusive use" provisions at model flying sites needed for VHF-band RC control systems' frequency control, for VHF-band RC systems that only used one set frequency unless serviced to change it, are not as mandatory as before. Remote control military applications are typically not radio control in

105-473: A derivative of the QQ-3 Radioplane drone was used to lay military communication wire. During the war Radioplane manufactured nearly fifteen thousand drones. The company was bought by Northrop in 1952. General characteristics Performance Related lists This article contains material that originally came from the web article Unmanned Aerial Vehicles by Greg Goebel, which exists in

140-406: A hand-held radio transmitter . Industrial , military , and scientific research organizations make use of radio-controlled vehicles as well. A rapidly growing application is control of unmanned aerial vehicles (UAVs or drones) for both civilian and military uses, although these have more sophisticated control systems than traditional applications. The idea of controlling unmanned vehicles (for

175-512: A human operator. An industrial radio remote control can either be operated by a person, or by a computer control system in a machine to machine (M2M) mode. For example, an automated warehouse may use a radio-controlled crane that is operated by a computer to retrieve a particular item. Industrial radio controls for some applications, such as lifting machinery, are required to be of a fail-safe design in many jurisdictions. Industrial remote controls work differently from most consumer products. When

210-461: A minimum of three control dimensions (yaw, pitch and motor speed), as opposed to boats, which required only two or one. As the electronics revolution took off, single-signal channel circuit design became redundant, and instead radios provided proportionally coded signal streams which a servomechanism could interpret, using pulse-width modulation (PWM). More recently, high-end hobby systems using pulse-code modulation (PCM) features have come on

245-526: A number of different relays when a particular frequency was received. The relays would in turn then activate various actuators acting on the control surfaces of the missile. The controller's radio transmitter would transmit the different frequencies in response to the movements of a control stick; these were typically on/off signals. The radio gear used to control the rudder function on the American-developed Azon guided ordnance, however,

280-435: A radio-controlled torpedo. In 1917, Archibald Low , as head of the secret Royal Flying Corps (RFC) experimental works at Feltham , was the first person to use radio control successfully on an aircraft, a 1917 Aerial Target . It was "piloted" from the ground by future world aerial speed record holder Henry Segrave . Low's systems encoded the command transmissions as a countermeasure to prevent enemy intervention. By 1918

315-580: A range of 20 to 30 meters. In 1906, in the presence of an audience which included King Alfonso XIII of Spain, Torres demonstrated the invention in the Port of Bilbao , guiding the electrically powered launch Vizcaya from the shore with people on board, which was controlled at a distance over 2 km. In 1904, Bat , a Windermere steam launch, was controlled using experimental radio control by its inventor, [Jack Kitchen]. In 1909 French inventor [Gabet] demonstrated what he called his " Torpille Radio-Automatique ",

350-559: A receiver there are usually several relays, and in something as complex as an overhead crane, perhaps up to twelve or more relays are required to control all directions. In a receiver which opens a gate, two relays are often sufficient. Industrial remote controls are getting more and higher safety requirements. For example: a remote control may not lose the safety functionality in case of malfunction. This can be avoided by using redundant relays with forced contacts. Leonardo Torres Quevedo Too Many Requests If you report this error to

385-540: A series of similar but improved variants, with the OQ-3 / TDD-2 and OQ-14 / TDD-3 produced in quantity. A number of other target drones were built by Radioplane (including licensed contractors) and competing companies during the war, most of which never got beyond prototype stage, which accounts for the gaps in the designation sequence between "OQ-3" and "OQ-14". After World War II ended, various experiment were made with Radioplane target drones. In one experiment in 1950,

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420-529: A system allowing his remote-controlled ship targeting an enemy ship's searchlights. In 1922 he installed radio control gear on the obsolete US Navy battleship USS Iowa so it could be used as a target ship (sunk in gunnery exercise in March 1923). The Soviet Red Army used remotely controlled teletanks during the 1930s in the Winter War against Finland and fielded at least two teletank battalions at

455-600: A torpedo, Tesla's 1898 patent included a clockwork frequency changer so an enemy could not take control of the device. In 1903, the Spanish engineer Leonardo Torres Quevedo introduced a radio based control system called the " Telekino " at the Paris Academy of Sciences . In the same year, he applied for several patents in other countries. It was intended as a way of testing Astra-Torres airship , a dirigible of his own design, without risking human lives. Unlike

490-551: A vehicle are the Mars Exploration Rovers such as Sojourner . Today radio control is used in industry for such devices as overhead cranes and switchyard locomotives . Radio-controlled teleoperators are used for such purposes as inspections, and special vehicles for disarming of bombs . Some remotely controlled devices are loosely called robots , but are more properly categorized as teleoperators since they do not operate autonomously, but only under control of

525-406: A young woman assembler named Norma Jeane Dougherty, who he thought had potential as a model. She was photographed in the plant, which led to a screen test for Norma Jeane, who soon changed her name to Marilyn Monroe . The OQ-2 is a simple aircraft, powered by a two-cylinder two-cycle piston engine, providing 6 horsepower (4.5 kW) and driving two contra-rotating propellers. The RC control system

560-744: The British and US also developed radio control systems for similar tasks, to avoid the huge anti-aircraft batteries set up around German targets. However, no system proved usable in practice, and the one major US effort, Operation Aphrodite , proved to be far more dangerous to its users than to the target. The American Azon guided free-fall ordnance, however, proved useful in both the European and CBI Theaters of World War II. Radio control systems of this era were generally electromechanical in nature, using small metal "fingers" or " reeds " with different resonant frequencies each of which would operate one of

595-556: The British launched a number of commando raids to collect the missile radio sets. Jammers were then installed on British ships, and the weapons basically "stopped working". The German development teams then turned to wire-guided missiles once they realized what was going on, but the systems were not ready for deployment until the war had already moved to France. The German Kriegsmarine operated FL-Boote ( ferngelenkte Sprengboote ) which were radio controlled motor boats filled with explosives to attack enemy shipping from 1944. Both

630-483: The Public Domain. Radio controlled Radio control (often abbreviated to RC ) is the use of control signals transmitted by radio to remotely operate a device. Examples of simple radio control systems are garage door openers and keyless entry systems for vehicles, in which a small handheld radio transmitter unlocks or opens doors. Radio control is also used for control of model vehicles from

665-630: The beginning of the Great Patriotic War . A teletank is controlled by radio from a control tank at a distance of 500–1500 m, the two constituting a telemechanical group . There were also remotely controlled cutters and experimental remotely controlled planes in the Red Army. The United Kingdom's World War One development of their radio-controlled 1917 'Aerial Target' (AT) and 1918 'Distant Control Boat' (DCB) using Low's control systems led eventually to their 1930s fleet of "Queen Bee" . This

700-416: The code word. It was able to select different positions for the steering engine and different velocities for the propelling engine independently, and also to act over other mechanisms such an electric light , for switching it, and a flag , for raising or dropping it, at the same time, and so up to 19 different actions. In 1904, Torres chose to carry out the first test on a three-wheeled land vehicle with

735-629: The current requirements at low voltage were greatly reduced and the high voltage battery was eliminated. In both tube and early transistor sets the model's control surfaces were usually operated by an electromagnetic ' escapement ' controlling the stored energy in a rubber-band loop, allowing simple on/off rudder control (right, left, and neutral) and sometimes other functions such as motor speed. Crystal-controlled superheterodyne receivers with better selectivity and stability made control equipment more capable and at lower cost. Multi-channel developments were of particular use to aircraft, which really needed

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770-437: The direct sense, directly operating flight control surfaces and propulsion power settings, but instead take the form of instructions sent to a completely autonomous , computerized automatic pilot . Instead of a "turn left" signal that is applied until the aircraft is flying in the right direction, the system sends a single instruction that says "fly to this point". Some of the most outstanding examples of remote radio control of

805-488: The individual signal characteristics of a particular PWM-type RC transmitter's emissions alone, without needing a special "code" transmitted along with the control information as PCM encoding has always required. In the early 21st century, 2.4 gigahertz spread spectrum RC control systems have become increasingly utilized in control of model vehicles and aircraft. Now, these 2.4 GHz systems are being made by most radio manufacturers. These radio systems range in price from

840-499: The late 1890s. In 1897 British engineer Ernest Wilson and C. J. Evans patented a radio-controlled torpedo or demonstrated radio-controlled boats on the Thames river (accounts of what they did vary). At an 1898 exhibition at Madison Square Garden , Nikola Tesla demonstrated a small boat that used a coherer -based radio control. With an eye towards selling the idea to the US government as

875-453: The market that provide a computerized digital data bit -stream signal to the receiving device, instead of the earlier PWM encoding type. However, even with this coding, loss of transmission during flight has become more common , in part because of the ever more wireless society. Some more modern FM-signal receivers that still use "PWM" encoding instead can, thanks to the use of more advanced computer chips in them, be made to lock onto and use

910-406: The most part in an attempt to improve the accuracy of torpedoes for military purposes) predates the invention of radio. The latter half of the 1800s saw development of many such devices, connected to an operator by wires, including the first practical application invented by German engineer Werner von Siemens in 1870. Getting rid of the wires via using a new wireless technology, radio, appeared in

945-433: The previous mechanisms, which carried out actions of the 'on/off' type, Torres established a system for controlling any mechanical or electrical device with different states of operation. This method required a transmitter capable of sending a family of different code words by means of a binary telegraph key signal, and a receiver, which was able to set up a different state of operation in the device being used, depending on

980-427: The receiver receives the radio signal which the transmitter sent, it checks it so that it is the correct frequency and that any security codes match. Once the verification is complete, the receiver sends an instruction to a relay which is activated. The relay activates a function in the application corresponding to the transmitters button. This could be to engage an electrical directional motor in an overhead crane . In

1015-413: The same package. While early control systems might have two or three channels using amplitude modulation , modern systems include twenty or more using frequency modulation . The first general use of radio control systems in models started in the early 1950s with single-channel self-built equipment; commercial equipment came later. The advent of transistors greatly reduced the battery requirements, since

1050-593: The secret D.C.B. Section of the Royal Navy's Signals School, Portsmouth under the command of Eric Robinson V.C. used a variant of the Aerial Target’s radio control system to control from ‘mother’ aircraft different types of naval vessels including a submarine. During World War I American inventor John Hays Hammond, Jr. developed many techniques used in subsequent radio control including developing remote controlled torpedoes, ships, anti-jamming systems and even

1085-549: The series of Telefunken Funk-Gerät (or FuG) 203 Kehl twin-axis, single joystick-equipped transmitters mounted in the deploying aircraft, and Telefunken's companion FuG 230 Straßburg receiver placed in the ordnance to be controlled during deployment and used by both the Fritz X unpowered, armored anti-ship bomb and the powered Henschel Hs 293 guided bomb, was greatly reduced by British efforts to jam their radio signals, eventually with American assistance. After initial successes,

Radioplane OQ-2 - Misplaced Pages Continue

1120-504: Was a fully proportional control, with the "ailerons", solely under the control of an on-board gyroscope, serving merely to keep the ordnance from rolling. These systems were widely used until the 1960s, when the increasing use of solid state systems greatly simplified radio control. The electromechanical systems using reed relays were replaced by similar electronic ones, and the continued miniaturization of electronics allowed more signals, referred to as control channels , to be packed into

1155-468: Was a remotely controlled unmanned version of the de Havilland " Tiger Moth " aircraft for Navy fleet gunnery firing practice. The "Queen Bee" was superseded by the similarly named Airspeed Queen Wasp , a purpose-built target aircraft of higher performance. Radio control was further developed during World War II, primarily by the Germans who used it in a number of missile projects. Their main effort

1190-509: Was built by Bendix. Launching was by catapult only and recovered by parachute should it survive the target practice. The landing gear was used only on the OQ-2 versions as sold to the Army to cushion the landing by parachute. None of the drones including the improved variants shipped to the Navy had landing gear. The subsequent variants delivered to the Army did not have landing gear. The OQ-2 led to

1225-557: Was the development of radio-controlled missiles and glide bombs for use against shipping, a target otherwise both difficult and dangerous to attack. However, by the end of the war, the Luftwaffe was having similar problems attacking Allied bombers and developed a number of radio command guided surface-to-air anti-aircraft missiles , none of which saw service. The effectiveness of the Luftwaffe 's systems, primarily comprising

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